Why Is Chevy Trailblazer Making Whistling Noise?

A high-pitched squeal when accelerating the car. If you have noticed a loud squeal when accelerating, It could be because of a loose or worn fan belt.  Chevy trailblazer making whistling noise, may be due to a lot of reasons, learn how to fix it in this article.

What is Causing Chevy Trailblazer Making Whistling Noise?

A  bad accessory attached to your Trailblazer’s engine always cause a whining sound when accelerating. Below given are the causes of whistling noises in chevy trailblazer.

1. Bad Alternator

When an alternator is bad it’ll begin to make a high-pitched whining sound. If not, it may not be the alternator making your trailblazer whine, although it doesn’t rule it out entirely.

2. Water Pump

If the water pump goes bad, it’ll make a squeaking sound.  It may sound like a deeper whine than a bad alternator.

3. Worn Serpentine Belt

Trailblazer’s serpentine belt is used for taking the motion from the crankshaft and using it to turn all of the accessories.  When it goes bad, it’ll cause a high-pitched sound.

3. Power Steering

The power steering pump may cause whistling noise when accelerating your chevy trailblazer. If it gets too low on the fluid they’ll make it’ll whine a lot.  You may need to check the fluid level and fill it back up to the factory fill line.

To determine if it is the power steering pump, turn the wheel left and right with the vehicle sitting.  Does the sound get louder while turning?  That’s a great indication that it is probably the power steering pump making noise.  All of your engine accessories will change their wine depending upon the RPM of the car.  Only the power steering pump will change with the steering wheel or the RPM.

4. Low Transmission Fluid

For both automatic and manual transmissions, the basic cause for whining when in gear is low transmission fluid. If the fluid is too low, then the internal components of the transmission are not lubricated properly. If the fluid is low, it’s advised to check for transmission fluid leaks and to get them fixed for the proper functioning of the vehicle.

5. Normal Operation

Some transmissions have an inherent noise that is normal. Depending on the make and model, the whine might be audible in the first gear, or it could be more noticeable if the car is in third gear or some other gear.

6. Worn Flywheel Or Clutch

If you are driving a manual transmission, there’s the possibility that your clutch is worn out or the flywheel needs to be resurfaced. When these components begin to wear, it becomes possible to hear grinding, whining and other sounds.

7. Bad Throw-Out Bearing

If you heard the whine while the clutch is not engaged, then there’s a chance that it’s the throwout bearing. However, it’s more common to hear noise from this bearing while operating the clutch, rather than driving in gear without putting any pressure on the clutch pedal.

8. Hissing, Sizzling Sounds

Hissing sounds like steam or air escaping from a pipe or hose. The sizzling sound is like a slice of bacon on a hot griddle. The hissing sound means your cooling system has possibly developed a leak. Gurgling sounds like a coffee pot percolating and this can result in coolant boiling. Sizzling is the result of that coolant or oil landing on a heated engine component.

The best thing you can do is to pull over as soon as possible, let the engine cool down and call a mechanic for inspection. If the car isn’t overheating but is still hissing, other possible maladies include a catalytic converter and a clogged exhaust but these are usually attached or associated with more noticeable driving problems.

9. Bad Input Shaft Bearing

A bad input shaft bearing is an internal bearing within the housing of the transmission, and it can create a whining sound when it begins to fail.

10. Bad Wheel Bearing

Wheel bearings are located in each wheel hub, but it seems as if it’s coming from the transmission. It’s more usual for a failing wheel bearing to create a roaring sound, but they can create noise while driving.

What Is The Annual Maintenance Cost Of Chevrolet Trailblazer?

The annual maintenance cost to maintain a Chevrolet Trailblazer is approximately $473, depending on your service provider.


The article discussed why the chevy trailblazer making whistling noise and how you could fix it. Hope the information was useful. If you have any queries with the mentioned information then please feel free to comment below, we will get back to you as soon as possible.

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